CN105004783A - Automatic frequency conversion integrated superstrong magnetic crack detector - Google Patents
Automatic frequency conversion integrated superstrong magnetic crack detector Download PDFInfo
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- CN105004783A CN105004783A CN201510391939.XA CN201510391939A CN105004783A CN 105004783 A CN105004783 A CN 105004783A CN 201510391939 A CN201510391939 A CN 201510391939A CN 105004783 A CN105004783 A CN 105004783A
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Abstract
An automatic frequency conversion integrated superstrong magnetic crack detector is especially applied to detection and crack detection caused by metal fatigue in industrial nondestructive detection industry, oil fields, shipbuilding, railway, electric power, aircraft manufacturing, boiler and pressure vessels, metal workpieces and pipe welded joints. In order to overcome defects of great existing crack detection effect difference, carrying inconvenience, leakage in detection and detecting error, the invention provides an automatic frequency conversion integrated superstrong magnetic crack detector. The crack detector provided by the invention integrates advantages of DC crack detection, low-frequency crack detection, power-frequency crack detection and high-frequency crack detection. The automatic frequency conversion integrated superstrong magnetic crack detector can be applied to crack detection of ferromagnetic workpieces with different metal compositions. The crack detector has an integrated design, is convenient to carry, has clear crack detection effect and has high efficiency.
Description
Art
The present invention relates to the superpower magnetic crack detector of a kind of automatic frequency-conversion integration, especially industrial nondestructive testing industry, oil field, shipbuilding, railway, electric power, aircraft manufacturing, boilers and pressure vessel equipment is applied to, metal works, pipe welding seam joint, the defect that metal fatigue causes carries out detecting, detecting a flaw.
Background technology
At present, known magnetic crack detector has direct current to detect a flaw and AC power frequency flaw detection, and direct current flaw detection can detect the deep crackle scar of workpiece, and AC power frequency flaw detection can detect the more shallow crackle scar of workpiece, the higher investigation depth of frequency is more shallow, and this is the result that electromagnetism kelvin effect causes.The metal ingredient of different metal workpiece is different, and thin and thick is different, and frequency sensitivity will be different, and flaw detection effect is widely different, and easily occur leaking and visit and visit by mistake, direct current defectoscope and power frequency defectoscope can not meet present flaw detection requirement completely.
Summary of the invention
Large in order to overcome existing defectoscope flaw detection effect difference, easy appearance leaks the shortcoming visited and miss spy, the invention provides the superpower magnetic crack detector of a kind of automatic frequency-conversion integration, possess advantage and the one of direct current flaw detection, low frequency flaw detection, power frequency flaw detection, high-frequency flaw detection, the superpower magnetic crack detector of this automatic frequency-conversion integration, can adapt to the ferromagnetic workpiece flaw detection of different metal composition.Integrated design, easy to carry, flaw detection effect articulation efficiency is high.
The technical solution adopted for the present invention to solve the technical problems is: signal transacting is integrated with magnetic yoke structure, provides height frequency variable frequency magnetic field, multifrequency point magnetic field, D.C. magnetic field.Signal processing method adopts sweep generator, pwm power amplifies driving yoke coil, variable frequency magnetic field is produced at U-shaped yoke two ends, automatically and manual adjustments sweep generator frequency, frequency sweep and multi-frequency detection method can effectively position defect, have increased substantially the quantification detection level of defect.The oxygen-free copper energy-gathering ring at U-shaped yoke two ends, under the effect of multifrequency alternating magnetic field, positive half cycle yoke magnetic energy output, oxygen-free copper energy-gathering ring stores part energy simultaneously, during negative half period yoke no-output, oxygen-free copper energy-gathering ring releases energy, and ensure that yoke has magnetic energy to export at positive negative cycle, while improving Non-Destructive Testing effect, substantially increase lifting force, complete the object designed by the present invention.
The invention has the beneficial effects as follows: signal transacting is integrated with magnetic yoke structure, easy to carry, low-and high-frequency variable frequency magnetic field, multifrequency point magnetic field, D.C. magnetic field are provided, adapt to the ferromagnetic workpiece flaw detection of different metal composition, reasonable application oxygen-free copper energy-gathering ring, improves lifting force and flaw detection effect.
Below in conjunction with accompanying drawing, the present invention is further described
Fig. 1 is the block diagram of the superpower magnetic crack detector of automatic frequency-conversion of the present invention integration
(1) sweep generator in figure, (2) manually automatically switch, and (3) frequency range regulates, (4) pwm power exports, (5) yoke coil, (6) U-shaped yoke, (7) oxygen-free copper energy-gathering ring.
Embodiment
In FIG, (1) sweep generator and (2) manual automatic switchover are connected, sweep generator (1) regulates (3) to be connected with frequency range, sweep generator (1) exports with (4) pwm power and is connected, pwm power exports (4) and is connected with (5) yoke coil, yoke coil (5) is connected with (6) U-shaped yoke, and U-shaped yoke (6) is connected with (7) oxygen-free copper energy-gathering ring.
Claims (2)
1. the superpower magnetic crack detector of automatic frequency-conversion integration, its signal processing method adopts sweep generator, and pwm power amplifier drives yoke coil, produces variable frequency magnetic field at U-shaped yoke two ends, strengthens magnetic force with oxygen-free copper energy-gathering ring.
2. the superpower magnetic crack detector of a kind of automatic frequency-conversion integration according to claim 1, is characterized in that:
Sweep generator (1) is connected with manually automatically switch (2), sweep generator (1) regulates (3) to be connected with frequency range, sweep generator (1) exports (4) and is connected with pwm power, pwm power exports (4) and is connected with yoke coil (5), yoke coil (5) is connected with U-shaped yoke (6), and U-shaped yoke (6) is connected with oxygen-free copper energy-gathering ring (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510391939.XA CN105004783A (en) | 2015-07-07 | 2015-07-07 | Automatic frequency conversion integrated superstrong magnetic crack detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510391939.XA CN105004783A (en) | 2015-07-07 | 2015-07-07 | Automatic frequency conversion integrated superstrong magnetic crack detector |
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| CN105004783A true CN105004783A (en) | 2015-10-28 |
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| CN201510391939.XA Pending CN105004783A (en) | 2015-07-07 | 2015-07-07 | Automatic frequency conversion integrated superstrong magnetic crack detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645388A (en) * | 2016-09-20 | 2017-05-10 | 黄新超 | High-frequency pulse magnetic powder flaw detection method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1068800A1 (en) * | 1982-10-04 | 1984-01-23 | Томский Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Политехнический Институт Им.С.М.Кирова | Two-frequency flaw detector (its versions) |
| CN103278559A (en) * | 2013-04-25 | 2013-09-04 | 宁波金特信钢铁科技有限公司 | Eddy current detecting device of seamless steel tubes |
| CN103412039A (en) * | 2013-09-04 | 2013-11-27 | 上海海事大学 | Electromagnetic fault detection sensing device in multi-frequency multiple drive models |
-
2015
- 2015-07-07 CN CN201510391939.XA patent/CN105004783A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1068800A1 (en) * | 1982-10-04 | 1984-01-23 | Томский Ордена Октябрьской Революции И Ордена Трудового Красного Знамени Политехнический Институт Им.С.М.Кирова | Two-frequency flaw detector (its versions) |
| CN103278559A (en) * | 2013-04-25 | 2013-09-04 | 宁波金特信钢铁科技有限公司 | Eddy current detecting device of seamless steel tubes |
| CN103412039A (en) * | 2013-09-04 | 2013-11-27 | 上海海事大学 | Electromagnetic fault detection sensing device in multi-frequency multiple drive models |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645388A (en) * | 2016-09-20 | 2017-05-10 | 黄新超 | High-frequency pulse magnetic powder flaw detection method |
| CN106645388B (en) * | 2016-09-20 | 2020-08-21 | 郑州麦克斯检测科技有限公司 | High-frequency pulse magnetic powder flaw detection method |
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Application publication date: 20151028 |